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This one was one terrible crash.

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This one was one terrible crash.

Old 12-30-2020, 03:06 PM
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sysiek
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Default This one was one terrible crash.

Old 12-30-2020, 06:13 PM
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ravill
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That was horrible!

The wing departed the fuse. Ugh.

That said, that was WAAYYY too hard of a maiden. He was pulling hard G's and flat spins.

Should every toy RC airplane be able to take what ever we throw at it, well maybe, but, on the first flight?

I usually like to do landing gear checks (which includes picking up the jet and checking for flex etc...), control strength checks (a simple pull on ailerons, flaps, elev, etc...), etcetera, etcetera.

If that truly was a maiden, there are only two jets which I'd pull that hard on a maiden:

1. BV's built Ultra Bandit

2. Anything Pablo et al sell at elite aero sports

Short of that, ain't no jet going to get pulled on that hard on a maiden.

I'm sorry for that gentleman's loss. So much work goes into building and maintaining these bad boys.
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Old 12-30-2020, 06:55 PM
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F900
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It absolutely sucks the wing failed and 100% loss, but you have to ask yourself was Markham Park the best place to maiden a turbine jet this size on a busy holiday weekend full of people? Its just asking for unwanted attention and the park office putting restrictions on flying turbines jets regardless of size because 99% of park visitors don't understand or have a clue what they are looking at and complain. That said I hope (Skymaster??) do the right thing and provide you with a new jet.
Old 12-30-2020, 08:32 PM
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He insinuated that he was testing it for Skymaster. It ended up in a lake near a homeless camp....
Old 12-31-2020, 12:10 AM
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And I found the part #2 video of the rescue attempts to find the turbine.

Old 12-31-2020, 05:21 AM
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Originally Posted by ravill View Post
That was horrible!

The wing departed the fuse. Ugh.

That said, that was WAAYYY too hard of a maiden. He was pulling hard G's and flat spins.

Should every toy RC airplane be able to take what ever we throw at it, well maybe, but, on the first flight?

I usually like to do landing gear checks (which includes picking up the jet and checking for flex etc...), control strength checks (a simple pull on ailerons, flaps, elev, etc...), etcetera, etcetera.

If that truly was a maiden, there are only two jets which I'd pull that hard on a maiden:

1. BV's built Ultra Bandit

2. Anything Pablo et al sell at elite aero sports

Short of that, ain't no jet going to get pulled on that hard on a maiden.

I'm sorry for that gentleman's loss. So much work goes into building and maintaining these bad boys.
I couldn’t agree more, it looked more like a demo flight than a maiden.
Old 12-31-2020, 06:42 AM
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sysiek
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I think I still have a video when David S was testing the shockwave at the 2011 Jet world masters Ohio and he was pushing the jet to absolute limits with some incredible g forces, yes the jet crashed , the main wing tube bent and the jet exploded in the air, but after the crash they knew what needed to be changed before the production model goes for sale and become one of the most popular sport jet at this time and is still very good.
Old 12-31-2020, 09:46 AM
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I wonder why the price of the airplane is always mentioned on these reports ????
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Old 12-31-2020, 10:54 AM
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I don’t agree. Maybe at that site ‘chucking it around’ wasn’t a good plan-but saying it was a maiden....so what.The failure would still have happened on flight 2 or 3...probably the same day, maybe with more confidence in the model so may have been pulling harder, earlier and it could have been closer and in the pits. Luck was there, so be thankful.
I’ve done all my system testing before the first flight, so with the only question on a new design being the airframe you go somewhere safe and ‘give it’ before it’s in public. If I was testing a new design I also want to know what its like, so try everything (presuming it feels in control) to have data before the critical landing.

I think the site is the issue...not the way it was flown

Happy New Year...nearly
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Old 12-31-2020, 11:08 AM
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Is the Kingtech 450 not 45kg thrust?

Seems like a huge turbine to put in a max 25kg airframe or am I missing something?

Poor flying site period.

Regards,

Last edited by Halcyon66; 12-31-2020 at 11:10 AM.
Old 12-31-2020, 11:13 AM
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I suppose performing aerobatics is a personal preference with a new airframe on the maiden, especially considering it is the designed use case for the jet. It should "technically" handle it well, as long as the builder did their job of course. That said, there have been a lot of lessons learned in performing preliminary test flights before you wring out a newly assembled aircraft. Things do come lose and the stresses of flight, landing, etc... begin to quickly show tell tale signs of items which can be addressed before they become a more serious problem. There is a lot of energy at play with a jet of this size, weight, and thrust. I guess there is no right or wrong way - what ever formula translates into success I suppose.

Last edited by skunkwurk; 12-31-2020 at 11:37 AM.
Old 12-31-2020, 12:20 PM
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Originally Posted by Halcyon66 View Post
Is the Kingtech 450 not 45kg thrust?

Seems like a huge turbine to put in a max 25kg airframe or am I missing something?

Poor flying site period.

Regards,
Skymaster states 48pounds of thrust max for this model.

A KingTech 450 offers almost TWICE that value and then he flies the model hard on its first flight ! Clueless, absolutely clueless.

Just the sort of crash we absolutely don't need if are are to continue this hobby.

Hard to imagine the consequences if the model had crashed in a fireball on the freeway behind the site.

The Feds would have had a field day.
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Old 12-31-2020, 01:51 PM
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lucky for the traffic on freeway and for the pilot , no one got hurt for this if yes he going to be getting jail time or court date
Old 12-31-2020, 02:07 PM
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Well guys you should joint FB LOL, this was the 3th flights...the airplane is a complete new Avanti from SM more like XXL just below 100lbs and it’s a 3D plane with vectors 😂
Old 12-31-2020, 02:48 PM
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Originally Posted by Dansy View Post
Well guys you should joint FB LOL, this was the 3th flights...the airplane is a complete new Avanti from SM more like XXL just below 100lbs and it’s a 3D plane with vectors 😂

Is it this one?

http://www.skymasterjets.net/avantixxl.htm

If so says max thrust 50lbs? why was he using a 99lb thrust turbine and how much fuel was on board? I'm assuming ALOT.
Old 12-31-2020, 02:55 PM
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Yes it is the XXL and again rated at around takeoff weight of 25kg, Skymaster has nothing in the 100lbs range.

So again 45kg turbine in a 25kg jet???

Also what is the deal with the dude in the balaclava?

Regards,
Old 12-31-2020, 03:03 PM
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Well guy’s thing about this a secs.....the 25kg doesn’t make sense not with anything SM put out and this is 3.8m long and with vectors, and 210 for power come on also doesn’t make any sense, I use that in my J-10 and Havoc SS.....

His jet he said was almost 100 lbs into LTM2

Most fly the XL with 210 and 300
Old 12-31-2020, 03:17 PM
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There is an old saying at Markham Park, the only R/C rules are the ones you make up yourself, in my years I've seen it all there, its a nice field but people don't care and do as the please without making smart decisions.

Last edited by F900; 12-31-2020 at 04:27 PM.
Old 12-31-2020, 03:44 PM
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The plane was a prototype and even bigger than the XL version listed on the Skymaster website. This one is called the XXL and has a 3 piece wing. It's not yet available to the public.



I have to add that I broke a stab in half on the maiden of my Avanti XL a few years back without pushing it. That ended my desire to own another Skymaster plane abruptly.
Old 12-31-2020, 04:54 PM
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Way to close to that freeway, as well as what looked to be a park with people/cars on the opposite area. Oh well. The pilot, as well as everyone on that freeway and surrounding area is very fortunate that jet ended up in the drink.

One of our local clubs has a distance of about 1600ft to the closest point of the highway... It looks much further, but I've seen planes go down that could easily reach the highway if their trajectory was different. These jets and giants get out there very quickly compared to smaller models.... Glad nobody was hurt.
Old 12-31-2020, 07:30 PM
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Originally Posted by Dansy View Post
Well guy’s thing about this a secs.....the 25kg doesn’t make sense not with anything SM put out and this is 3.8m long and with vectors, and 210 for power come on also doesn’t make any sense, I use that in my J-10 and Havoc SS.....

His jet he said was almost 100 lbs into LTM2

Most fly the XL with 210 and 300
If the model was almost 100 lbs, then in order to comply with the AMA LTMA-2 program, the maximum thrust should be limited to the model's wet weigh + 5 lbs, or 90 lbs, whichever is less.

Bob
Old 12-31-2020, 08:15 PM
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If this model is 3.8 mtrs long then by using SW's and scaling the picture the policeman is 2.29 meters tall.


Not an exact since yet seems like a rather tall group of guys.

If he was testing it for SM they should be pretty happy it is all over the net, great advertising...............Not.

Off the Skymaster website,

Avanti XXL new 3D VT nozzle tested , Powered by P-200

Length: 149.6"(3800mm). Wingspan: 124.5''(3160mm).

Power: 50Lb (21kg) thrust up

Dry Weight : 56-60Lbs (23-26kg)


So if some one put a 45kg turbine in this model and more so somehow got it to weigh 100 lbs it was doomed before it took off.

Regards.

Last edited by Halcyon66; 12-31-2020 at 08:59 PM.
Old 01-01-2021, 08:17 AM
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Haha, this thread reminds me the first years of turbine flying... people trying new things, crashing planes and trying to retrieve a turbine from a very wrong place like a pond infested with alligators, or a house farm with a angry owner...(always worse than a alligator)

Bummer for the crash, but this things happens. Anyway, a good 2021 for everyone here!

Old 01-01-2021, 09:35 AM
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ravill
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So was it a maiden or a 3rd flight.

That would make a difference.

Oh and we are here because we hate fakebook. #thumbsdown
Old 01-01-2021, 09:45 AM
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A maiden flight of a jet this size in an area as densely populated ( judging by the back ground ) ...........not the wisest safety move , just happy no one or gators was hurt
I prefer some space on a maiden for that "just in case" moment
It is quite obvious that he is an accomplished jet jockey ......but - safety first
Was the officer trying to talk him not to fly ?

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